Yamaha which showcased two new 150cc bikes, today said that the YZF R15 will be equipped with next-generation DiASil (Die-casting Aluminum-Silicon) Cylinder. Yamaha’s “DiASil Cylinder” is an all-aluminum die-cast cylinder with 60% better cooling performance and 30% cheaper production cost than a conventional cylinder. Yamaha “DiASil Cylinder” , is the world’s first all-aluminum die-cast cylinder and it achieves cooling performance equivalent to that of a nickel-plated cylinder, which is currently recognized as the best in the industry, but at a significantly lower production cost than a nickel-plated cylinder. DiASil is a technology which brings together an ideal combination of material, manufacturing technology and environmental friendliness. The material used is a 20% silicon content aluminum alloy, the manufacturing technology is the Yamaha CF Aluminum Die-cast Technology (*3), which enables the production of an all-aluminum die-cast cylinder. It is Yamaha’s exclusive CF Aluminum Die-cast Technology that enables the mass production of a die-cast cylinder made completely of 20% silicon content aluminum alloy, something that could not be done with conventional die casting methods. According to Mr. Sanjay Tripathi, Head of Dept- Product Planning & Strategy, “Conventional engine cylinders have a steel liner to reduce the friction resulting from the piston’s movement. The “DiASil” cylinder is made by the exclusive Yamaha Aluminum Controlled Forging (CF) technology. Because the “DiASil” Cylinder is all aluminum, it has excellent heat dissipation qualities and reduces engine weight at the same time. In comparison to cast steel liner type aluminum cylinders, the DiASil cylinder has 60% better cooling performance at 30% lower manufacturing cost and enables 30% lighter design which results in better power to weight ratio besides excellent recyclability.